{"id":661,"date":"2008-07-04T09:36:00","date_gmt":"2008-07-04T07:36:00","guid":{"rendered":"https:\/\/kids.esa.int\/can_et_hear_the_sounds_of_earth\/"},"modified":"2026-10-08T00:30:51","modified_gmt":"2026-10-07T22:30:51","slug":"can_et_hear_the_sounds_of_earth","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/sv\/can_et_hear_the_sounds_of_earth\/","title":{"rendered":"Kan utomjordingar h\u00f6ra ljuden fr\u00e5n jorden?"},"content":{"rendered":"<div class=\"lede\">\n<p>ESA:s fyra Cluster-rymdfarkoster har uppt\u00e4ckt att jorden och andra planeter har ett s\u00e4tt att ropa \u201cH\u00e4r \u00e4r jag!\u201d till resten av galaxen. Meddelandena fr\u00e5n planeterna kan dock endast h\u00f6ras och f\u00f6rst\u00e5s med hj\u00e4lp av stora radioteleskop. En utomjordisk ras som f\u00e5ngar upp jordens naturliga radiosignaler kommer att h\u00f6ra en serie pip och visslingar, ungef\u00e4r som att lyssna p\u00e5 R2-D2, roboten fr\u00e5n Star Wars.<\/p>\n<\/div>\n<p>F\u00f6r n\u00e4rvarande \u00e4r inte ens de modernaste teleskopen tillr\u00e4ckligt kraftfulla f\u00f6r att uppt\u00e4cka planeter av jordens storlek kring avl\u00e4gsna stj\u00e4rnor. Utomjordiska astronomer st\u00e5r inf\u00f6r samma problem \u2013 att s\u00f6ka efter jorden skulle vara som att leta efter en n\u00e5l i en h\u00f6stack. Men v\u00e5r planets radioutbrott \u2013 som \u00e4r 10 000 g\u00e5nger starkare \u00e4n den kraftigaste milit\u00e4ra radarsignalen \u2013 avsl\u00f6jar tydligt jordens n\u00e4rvaro.<\/p>\n<figure class=\"wp-block-image size-natural\" data-width=\"400\" data-credit=\"ESA\" data-detail-url=\"https:\/\/www.esa.int\/Media\/Animations\/Auroral-2HQ\" data-licence=\"ESA Standard Licence\" data-licence-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Terms_and_conditions_of_use_of_images_and_videos_available_on_the_esa_website\"><img decoding=\"async\" loading=\"lazy\" style=\"max-width:100%;height:auto\" src=\"https:\/\/www.esa.int\/var\/esa\/storage\/images\/media\/animations\/auroral-2hq\/9257-5-eng-GB\/Auroral-2HQ.jpg\" alt=\"\"><\/figure>\n<p>Forskare har sedan 1970-talet vetat att planeter med magnetf\u00e4lt (bland annat Jorden, Jupiter och Saturnus) avger starka radiosignaler. Str\u00e5lningen alstras h\u00f6gt ovanf\u00f6r varje planet av samma solpartiklar som orsakar norrskenet som lyser upp himlen nedanf\u00f6r. Hittills hade astronomer antagit att dessa radiov\u00e5gor spred sig ut i rymden i en allt bredare kon, precis som ljuset fr\u00e5n en ficklampa. Tack vare Cluster vet vi nu att detta inte st\u00e4mmer.<\/p>\n<p>N\u00e4r radiov\u00e5gorna i omg\u00e5ngar n\u00e5dde varje rymdfarkost kunde forskarna ber\u00e4kna deras storlek och position. Det visar sig att signalerna f\u00e4rdas genom rymden i en smal str\u00e5le. Detta g\u00f6r det mycket enklare att fastst\u00e4lla exakt varifr\u00e5n de kommer. I framtiden kanske vi kan uppt\u00e4cka fr\u00e4mmande v\u00e4rldar genom att lyssna efter deras pip och visslingar.<\/p>","protected":false},"excerpt":{"rendered":"<p>ESA\u2019s four Cluster spacecraft have found that Earth and other planets have a way of shouting \u201cI\u2019m here!\u201d to the rest of the Galaxy. However, the messages from the planets [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"esa_banner_image":"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2002\/08\/the_cluster_constellation\/17863826-3-eng-GB\/The_Cluster_constellation.jpg","esa_banner_description":"The Cluster constellation","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2002\/08\/The_Cluster_constellation","esa_external_url":"","esa_external_new_window":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":true},"categories":[14,10,13],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-661","post","type-post","status-publish","format-standard","hentry","category-are-we-alone","category-learn","category-life-in-space"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/661","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/comments?post=661"}],"version-history":[{"count":5,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/661\/revisions"}],"predecessor-version":[{"id":4616,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/661\/revisions\/4616"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/media?parent=661"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/categories?post=661"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/tags?post=661"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/panel?post=661"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/language?post=661"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/age?post=661"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/duration?post=661"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/resource_type?post=661"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/audience?post=661"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/wf_post_folders?post=661"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}